page_title: List of the prehistoric life of Colorado
section_title: Selected Paleozoic taxa of Colorado
hierarchical_section_title: List of the prehistoric life of Colorado / Paleozoic / Selected Paleozoic taxa of Colorado
caption_attribution_description: English: crop of File:Astraspis desiderata.jpg
context_page_description: This list of the prehistoric life of Colorado contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Colorado.
context_section_description: †Actinoceras
  †Aglaocrinus
  †Amorphognathus
  †Amplexus
  †Archaeocidaris
   †Astraspis – type locality for genus
  †Astraspis desiderata – type locality for species
  †Athyris
  †Aviculopecten
  †Calamites
  †Calamites cistii
  †Calamites cruciatus
  †Callipteris
  †Callipteris lyratifolia – or unidentified comparable form
  †Camarotoechia
  †Caninia
   †Catenipora
  †Ceraurinus
  †Charactoceras – tentative report
  †Chirognathus
  †Composita
  †Composita ovata
  †Conocardium
  †Cordaites
  †Cornulites
  †Crania
  †Ctenacanthus
  †Ctenacanthus buttersi
  †Ctenacanthus furcicarinatus
  †Cupressocrinites
   †Cutleria – type locality for genus
  †Cutleria wilmarthi – type locality for species
  †Cyclopteris
  †Cyrtogomphoceras
  †Cyrtospirifer
  †Cyrtospirifer animasensis
  †Cyrtospirifer whitneyi
  †Echinosphaerites – tentative report
  †Edestus
  †Endoceras
  †Eretmocrinus
   †Eryops
  †Euomphalus
  †Girvanella
  †Halysites
  †Isalaux – type locality for genus
  †Isonema
  †Kionoceras
  †Lambeoceras
  †Lepidodendron
  †Lepidostrobus
  †Limnoscelis
  †Lingula
  †Meristella
  †Neospirifer
  †Neospirifer goreii
  †Neuropteris
  †Neuropteris auriculata
  †Neuropteris gigantea – tentative report
  †Neuropteris heterophylla
   †Ophiacodon
  †Oradectes
  †Ormoceras
  †Orthoceras
  †Oulodus
  †Paladin – tentative report
  †Pecopteris
  †Pecopteris arborescens
  †Plaesiomys
  †Platyceras
   †Platyhystrix
  †Platyhystrix rugosus
  †Pugnax
  †Receptaculites
  †Samaropsis
  †Sandia
  †Seymouria
  †Sigillaria
  †Sigillaria elegans – or unidentified comparable form
  †Sphenophyllum
  †Sphenopteris
  †Spirifer
  †Spirifer centronatus
  Spirorbis
  †Spyroceras
  †Stigmaria
  †Strepsodiscus – type locality for genus
  †Strophomena
  †Syringopora
   †Taxocrinus
  †Walchia
  †Westonoceras
caption: Life restoration of the Middle-Late Ordovician jawless fish Astraspis
exif: {}